Challenge Center Online
Dedicated to capturing the imaginations of young students through exploring the universe.

Earth Viewer
Especially designed for elementary students. Shows the daytime and nighttime portions of the Earth for any day of the year.

Educational Activities
Features a collection two types of lessons for K-12 students: student inquiries and Spacequests.

Exploring Planets in the Classroom
Don't miss the classroom-ready reproducibles about the universe.

Hands-On Universe
Teacher resources and student tools for exploring the night sky. From the University of California at Berkeley.

Moon
An index of sites about exploration, phases and eclipses, as well as the Apollo missions, lunar features, and discoveries.

Moon Calendar
A customizable tool for elementary students. Just enter a few numbers to find out the phases of the moon on a given date.

NASA Human Spaceflight
Lots of resources, plus see how your school can participate in NASA's Educational Outreach Programs.

NASA Spacelink
Tools for teaching aeronautics and space to your students. Especially for educators.

Night Sky
A look at timely and though-provoking space information for the whole family. From FamilyEducation.com.

Nine Planets
A virtual tour of the universe using multimedia tools.

Passport to Knowledge
Uses the latest technologies to connect students and teachers to the nation's leading researchers.

Solar System
An index of sites on the solar system, the sun, the planets, planetary moons, asteroids, comets and meteors.

Solar System Simulator
Customize an online solar system simulator to help visualize the universe. Even more incredible tools from NASA.

Space and Astronomy for Kids
How to turn your students into stargazers. All the links you need to hook your students on astronomy.

Space Science Institute
Downloadable instructional materials, including teacher guides and multimedia tools.

Space Theme
A directory of sites on Mars, space shuttle, exploring space, space agencies, astronomy and comets.

StarChild
A fun, friendly site for young astronomers.

Thursday's Classroom
Provides a lasting, high-quality link between NASA research and the classroom.

Welcome to the Planets
Another NASA resource geared towards teachers and their students. Features data sheets on each of the nine planets.